Bontrager
Ion 800 R

Think of it as a USB-rechargeable torch
Powerful enough to light every journey, the award-winning Ion 800 R packs the power of light into a sleek design for use at home or on any road, mountain, or town bike. Bright and compact, the Ion 80
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Think of it as a USB-rechargeable torch

Powerful enough to light every journey, the award-winning Ion 800 R packs the power of light into a sleek design for use at home or on any road, mountain, or town bike. Bright and compact, the Ion 800 R is powered by a CREE LED that lights up the road or trail with 5 modes and an adjustable sync bracket for easy mounting.

After looking at some of the other reviews, maybe there was a bad run in manufacturing. As I have had mine for three years and has performed flawlessly. Why not five stars? After year one I lost the rubber cover for the charge port. Even so, I've had no issues.
I use this light daily for over an hour on high with no loss of power. As winter comes on, I use it on my morning ride, on my commute to work, and commute home. It is small, compact. Sure there are brighter lights for twice the money, but this does the job.

I had an Ion 700 light last year and somehow it got lost during the off season, replaced it with this light and have been using it for 8 months now with no problems, it recharges easily, it is very bright, and doesn't take up much room on my bars. Love this light. I just got one of these for my riding partner as I am tired of his light running out of charge mid-ride.